Hoisting and conveying device



un 15 1924. i j y D. s. ANDREWS HOISTING AND CONVEYING DEVICE Filed Dec. 5. 1921 3 Sheets-Sheet. 1

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D. S. ANDREWS,

HOISTILNG AND CONVEYING DEVICE Filed Dec. 5. 1921 3 Sheets-Sheet 2 35 f 5 fo D. S. ANDREWS HOISTING AND CONVEYING DEVI CE` Filed Dec. 5, 1921 3 Sheets-Sheet 3 ArraeA/EK Patented July l5, 1924.

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lDONALD SHIELDS ANDREWS, OF CLEVELAND, OHIO, ASSIGNOB. T0 ANDREWS CRANE CORPORATION, 0F CLEVELAND, OHIO, A CORPORATION O'F DEI'JAJV'ARE` I HOISTING ND CONVEYING DEVICE.

Application led December To all whom t may concern:

Be it known that I, DoNALDS. ANDREWS, a citizen ofthe UnitedStates,-resident of Cleveland, county ofCuyahoga, and State of Ohio, have invented new and useful Improvements in Hoisting and Conveying Devices, of which the following is a specification, the 'principle of -the invention being herein explained andthe Abest mode in which I have contemplatedY applying that principle, so as to distinguish it; from other inventions. l v

This invention relates to hoisting and conveyingv devices, particularlyy to the type in which a 'rotary boomY is suspended from an overhead tractor carriage by meansof a depending mast.

The objects of the present invention are to simplify the construction ofthe supporting carriage and to equalize the load thereon to maintain a substantiallyV equal loadvon each v ofthe traction wheels.

' vThe annexeddrawings and following'de scription set forth in detail the preferred form of my invention and one modification thereof, these, however, constituting but one of" the various mechanical forms in' which Y the principle of the invention' may be ernployed.

In said annexed drawings: f

Fig. 1 is a top plan .viewl ofthe crane supporting carriage, with vthe I 'bea-in rails cut f Y away to show` the wheels ofthe carriage.

Fig. 2 is a sidev eleVation'of-the carriage, Fig. 3 is a section'on line III-III of Fig. 2. f*

' Eig. is `a i section on'line Ivc-IV yof Fig.\2.'-k j V- "Fig, 5 is a section oni line Vv of Fig. 3.

' Figsg and 7 showa top plan view and a side'elevation, respectively, Vof the I entire crane. v Y

Fig. 8 jis atop plan `view of a modified form of the invention. f

Fig. 9 is la longitudinal section ony IXQIX of Fig. 8."vl

Fig. 10 is a ytransverse section on lline line'.

5, 1921. Serial N0. 519,823.

members 4l' at the ends thereof adapted to receive the suspension bolts 5 of the front Y and rear trucks. The bolts 5 are fixed to the truck frames and are threaded attheir lower, ends to receive the nuts 6 to support the body member 3.

The' front and rear trucks are exactly alike and interchangeable. A description of one, therefore, will suflice for both. rlhe truck consists of'a rigid rectangular channel iron frame 7 carrying a pair of axles 8 and -9 to which are fixed the flanged wheels 10 which travel on the track rails 2. The frame 7 isprovided with a pair of intermediate cross bars 11 which carry the block 12 in which the suspension bolt 5 is fixed. Extending from one ofthe bars 11 to the en d of the frame 7 Vare a pair oflongitudinal bars 13 from which is suspended thedriving motor 1-1. rEhe shaft of the motor 14C carries a small pinion 15 meshing with a larger pinionzl fixed to a countershaft 17 carried between one of the barsl and the side rail of the frame 7. The coun'tershaft has fixed thereto a secondjpinion `18 meshing with a pinion 19 fixed to the axle 9.

VVThe swivel connections between the trucks and body .member V3 of the carriage permit the carriage to readily pass over sharp curves infthe track, the body member 3 ofthe carriage being relatively narrow so as toiremain clear "ofthefrails 2 iin passing such cunvQSf Y The.depending boom supporting mast 20 suspended 'from and fixedly secured to the carriage 1 by means of a suspension frame 21. Thesuspension frame 21 has vertical posts 22 on' opposite sides of the body member 3 -of the carriage The posts 22 carry between them a rectangular casting 23 havinga convex under surface fitting in a concave socket 2li-inthe upper face of the body member 31 at the center thereof forming a universal joint between the mast and the carriage, wherebysaidmast may swing in any: direction, such swinging movement, however, being limitedas will be hereinafter described. The suspension frame 21 has longitudinalv channel ironside rails'25 carryingcross bars 26l fixed to their upper fla'ngesat the front-and rearthereof. v r rThe cross bars 25 9%??? 0.11 their UPPQT faces angle guide brackets 27 engageable with opposite sides of the bearing members 4 on the frontgand rear trucks,` by means of which the suspension'frame 21 is `maintained in Valinement with the body member 8 of the carriage. ,v Thericross barsarepositioned directly beneath the? suspension .bearings` of the front and rear trucks which is centrally positioned with respect to` thev front and:

rear wheels 10 of each truck. The outer ends of the cross bars'26'c-arry*rollers28 mounted in .bearing members .29 upon the upper faces of thek bars4 26".andengageable witlrftheunderside oftherails 2.1 Theserollers may hence,v be properly considered a part kof the Varms and ,constitute kmeans. for

reducing the friction between said arms andthe underside ofsaidjrails The said rollers 28 are somewhat wider than the rails 2 to maintainr engagement with same'in passingaround curves; K

The mast hasn a cylindrical` casing 30 rotatably mounted thereon. The upper end of the said easingBO has fixed thereto crane herein rshown is in itself'A not apart of the present invention. The crane herein shown being substantially the ,samev asthat shown and described in my PatentA No. 1,367,907 issued February 8, 1921.

InFigs'.- 8,7 9`and'10 I have shown a modied vform of my invention. In this ymodification thel carriage 40 is eXactlythe samel as the carriage 1 in the preferred form eX- cept'that the 'body' member`41v` is' provided with` a rectangular mast receiv-ingsocket 42 adapted to receive the upper end offtlie de-k pending mast 48 which 'is supported'upona pivot pin 44 theaXis Yof Vwhich is l'disposed longitudinally with respect to the carriage. The socket42 lis enlarged Ato per-mit a' slight pivotal movement of the mast therein. Just below the' carriage'a crossfmem'ber 45 is ri idly secured to thefmastll.-l` The V.outer en sof the cross member 45fcarry Vwide rollers `46 fengageable v with the i under i Afaces of fthe f rails l2.'- Thereis f preferably -1 slight amount of play between-the rollers 46 and the tracks2`so that pressure-is exerted upon the rollers 46 kl'only when'the load onthe mast ytends to lswingfthe-1mast r to 'one' 'side v or the other-"or "where there I :is .an rirregularity ini the level ofi-the 'track-fraile? The rollers 46 are somewhat wider than the rails 2 to allow for lateral play and to prevent disengagement thereof in passing, around curves.

Below the cross member 45 the mast 43 is provided with a rotatable sleeve47 which carries a vertically adjustable slide and boom such as shown in Figs. 6 and 7. Rigidly suspended from the cross member 45 is a platform 48 supporting a motor 49 adapted to'rotate-'the sleeve through suitable gearing.

Figs. 11 and" 12 illustrate `dia-grammati-` cally'the principle of the invention.V If' the mast 2Q were suspendedvby a' universal joint from the centra-l portionV ofthe body member *Y 3 withoutU the Ymaterial limitation of movement which is provided in the #illus-f, tratedstructure, so as tofbe free to? assume desirable.y On the other hand,` if the mast 2O is rigidly connected` to the carriage,l the component of the-loadtending'to move the mast out of vertical positionv causes an -unequaldistribution of the load onzthe-traction wheels of 'the carriage. If the boom is extending'laterally the traction wheelson the rail" away from the boom tend to lift off the rails and consequently:arelikely to slip. 1f the'boom is extending forwardly `the rear wheels'tend to raise off'the rails. The pure pose of the lpresent invention is` toretain the necessary rigidity in the mastv and at `the same time to maintain equal traction on the wheels of the carriage:t This 'fis accomplished by providing the arms 25 rigidly Such' a construction is, however, obviously unconnected to the pivoted mast Vand carrying the-f rollers 28 engageable with the under side i of the rails beneath the trucks; When a loady is-applied to thefboom 35whenV the. boom' is extending forwardly the mast 20 swings slightly towthe rear and therear rollers 28 rengage the rails beneath the, rear truck of the carriage transmitting the vrearward thrust on the mast 20 to the rear rollers 28 Vand rails 2 instead of to the carriagefand maintaining an equalv load.` on the rear Htraction wheels.` If the boonris extending flat-1` erally when vthe load is applied the rollers 28 onthe side loppositethe boom are lbrought into engagement withfthearails andFreceive the thrust 'on the vmast V2O "duefto' Asuchcload, maintaining an equal loadsfon the traction wheels at opposite fsidesfof :the carriage.

In the modification shown in lvlfigsl 8,9 and 1() the 'boom Vis mounted-to Swingin a lateral direction-'only and'fthe `armj45fwithits 1rollers 46 preventsirlateraltiltinggof; the carriagev 1 only. Since the: tenden'cywt'otilt. isf greater f in' af lateral. direction;v due-.to

greater leverage, the simpler form shown in Figs. 8, 9 and 10 may be preferable in some cases.

What I claim is:

1. In a hoisting and conveying device, the combination of a track comprising spaced rails; a carriage mounted to travel along said track; a boom supporting mast pivotally suspended from said carriage for swinging movement with respect thereto; and means carried by said mast and engageable with said 'rails to limit the oscillatory movement of said mast.

2. In a hoisting and conveying device, the combination of a track comprising a pair of spaced rails; a carriage having wheels running on said rails; a boom supporting mast pivoted to said carriage between said rails for swinging movement with respect to said carriage and arms rigidly connected to said mast and engageable with the under side of said rails to limit the oscillatory movement of said mast.

3. In a hoisting and conveying device; the combination of a track comprising a pair of spaced rails; a carriage comprising front and rear trucks having wheels running on said tracks and a body member having swiveled connection with said trucks; means for driving said wheels; a boom supporting mast pivotally suspended from said body member; and arms rigidly connected to said mast and engageable with the under side of said rails to limit the oscillatory movement of said mast.

5. In a hoisting and conveying device, the

combination of an overhead track comprising spaced rails; a carriage comprising front and rear traction wheels; and a body member connecting said trucks; a boom supporting mast suspended by a universal joint from said body member; and means for limiting the swinging movement of said mast in any direction and for equalizing the load on said traction wheels.

6. In a hoisting and conveying device, the combination of an overhead track com rising spaced rails; a carriage comprising ront and rear trucks having t-raction wheels, and a body member connecting said trucks; a boom supporting mast suspended by a universal joint from said body member; and an arm rigidly carried by said mast, said arm carrying rollers engageable with the under sides of said rails beneath said front and rear trucks. i

Signed by me this 11th day of November, i

DONALD SHIELDS ANDREWS. 

